lesson 4

• Cellular respiration is a process that all living things use to convert glucose into energy.
• Cellular respiration can be aerobic or anaerobic.
• Aerobic respiration requires oxygen in order to produce ATP.
• Anaerobic respiration is the release of a relatively small amount of energy in cells by the breakdown of food substances in the absence of oxygen.
• Aerobic respiration takes place in the presence of oxygen.
• Anaerobic respiration takes place in a condition where there is a low oxygen environment.
• During aerobic respiration, there is an exchange of gases where oxygen is absorbed and carbon dioxide is released.
• The exchange of gases doesn’t take place during anaerobic respiration, but some gases like sulfur and nitrogen gases are released by some organisms.
• Aerobic respiration, after glycolysis, occurs in the mitochondria of eukaryotes and cytoplasm of prokaryotes.
• Anaerobic respiration occurs only in the cytoplasm of a cell.
• The end products of aerobic respiration are carbon dioxide, water, and energy.
• The end products of anaerobic respiration are acids, alcohols, gases, and energy.
• A total of 36 - 38 ATPs are produced during aerobic respiration, some of which are lost during the process.
• Only 2 ATPs are formed during anaerobic respiration.
• Carbohydrates and oxygen are the prerequisites of aerobic respiration.
• Some other electron acceptors like sulfur and nitrogen are required along with the carbohydrates.
• Aerobic respiration is comparatively longer than anaerobic respiration.
• Anaerobic respiration is shorter than aerobic respiration.
• Aerobic respiration occurs in most of the higher organisms like plants and animals.
• Anaerobic respiration occurs in primitive prokaryotes.
• Anaerobic respiration also takes place in the muscle cells in humans during extreme movements.